Year: 2014
Type: article
Abstract: The normal branch of Dvali-Gabadadze-Porrati braneworld gravity with brane tension is confronted by the currently available cosmic observations from the geometrical and dynamical perspectives. On the geometrical side, the type Ia supernova as standard candle, the baryon acoustic oscillation as standard ruler and the cosmic microwave background measurement from the first released 15.5 months data were used to fix the background evolutions. On the dynamical side, the redshift space distortion data will be used to determine the evolution of the matter perturbation. Through a Markov chain Monte Carlo analysis, we found the dimensionless crossover scale Ω r c = 1/(4 H 2 0 r 2 c ) = 0.00183 −0.00183 +0.000338 in a spatially flat normal branch of Dvali-Gabadadze-Porrati braneworld. This result suggests that the crossover scale r c should be around 12 H −1 0 which is consistent with the previous result r c > 3 H −1 0 and greater. It also implies that the five-dimensional gravity effect is weak to be observed in H −1 0 scale.
Author: Lixin Xu
Institution: Dalian University of Technology
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2020866580